I've just downloaded the nightly build of Scilab, installed it on
Windows XP and tried to run an XCos session.
This error came out:
Scilab has found a critical error (EXCEPTION_ACCESS_VIOLATION)
with "scicosim" function.
Save your data and restart Scilab.
After this, Scilab turns unusable (no commands do anything) and must
be killed with Task Manager.
Best wishes
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frmsrcurl: http://compgroups.net/comp.soft-sys.math.scilab/Bad-behaviour-of-Xcos-in-Scilab-nightly-build